摘要:
Methods of making Si-containing films that contain relatively high levels of substitutional dopants involve chemical vapor deposition using trisilane and a dopant precursor. Extremely high levels of substitutional incorporation may be obtained, including crystalline silicon films that contain 2.4 atomic % or greater substitutional carbon. Substitutionally doped Si-containing films may be selectively deposited onto the crystalline surfaces of mixed substrates by introducing an etchant gas during deposition.
摘要:
Chemical vapor deposition methods use trisilane and a halogen-containing etchant source (such as chlorine) to selectively deposit Si-containing films over selected regions of mixed substrates. Dopant sources may be intermixed with the trisilane and the etchant source to selectively deposit doped Si-containing films. The selective deposition methods are useful in a variety of applications, such as semiconductor manufacturing.
摘要:
Methods of making Si-containing films that contain relatively high levels of substitutional dopants involve chemical vapor deposition using trisilane and a dopant precursor. Extremely high levels of substitutional incorporation may be obtained, including crystalline silicon films that contain 2.4 atomic % or greater substitutional carbon. Substitutionally doped Si-containing films may be selectively deposited onto the crystalline surfaces of mixed substrates by introducing an etchant gas during deposition.
摘要:
Methods of making Si-containing films that contain relatively high levels of substitutional dopants involve chemical vapor deposition using trisilane and a dopant precursor. Extremely high levels of substitutional incorporation may be obtained, including crystalline silicon films that contain 2.4 atomic % or greater substitutional carbon. Substitutionally doped Si-containing films may be selectively deposited onto the crystalline surfaces of mixed substrates by introducing an etchant gas during deposition.
摘要:
A relaxed silicon germanium structure comprises a silicon buffer layer produced using a chemical vapor deposition process with an operational pressure greater than approximately 1 torr. The relaxed silicon germanium structure further comprises a silicon germanium layer deposited over the silicon buffer layer. The silicon germanium layer has less than about 107 threading dislocations per square centimeter. By depositing the silicon buffer layer at a reduced deposition rate, the overlying silicon germanium layer can be provided with a “crosshatch free” surface.
摘要:
Chloropolysilanes are utilized in methods and systems for selectively depositing thin films useful for the fabrication of various devices such as microelectronic and/or microelectromechanical systems (MEMS).
摘要:
Methods of making Si-containing films that contain relatively high levels of substitutional dopants involve chemical vapor deposition using trisilane and a dopant precursor. Extremely high levels of substitutional incorporation may be obtained, including crystalline silicon films that contain 2.4 atomic % or greater substitutional carbon. Substitutionally doped Si-containing films may be selectively deposited onto the crystalline surfaces of mixed substrates by introducing an etchant gas during deposition.
摘要:
Chemical vapor deposition methods use trisilane and a halogen-containing etchant source (such as chlorine) to selectively deposit Si-containing films over selected regions of mixed substrates. Dopant sources may be intermixed with the trisilane and the etchant source to selectively deposit doped Si-containing films. The selective deposition methods are useful in a variety of applications, such as semiconductor manufacturing.
摘要:
A relaxed silicon germanium structure comprises a silicon buffer layer produced using a chemical vapor deposition process with an operational pressure greater than approximately 1 torr. The relaxed silicon germanium structure further comprises a silicon germanium layer deposited over the silicon buffer layer. The silicon germanium layer has less than about 107 threading dislocations per square centimeter. By depositing the silicon buffer layer at a reduced deposition rate, the overlying silicon germanium layer can be provided with a “crosshatch free” surface.
摘要:
A new model is provided for the CVD growth of silicon germanium from silicon-containing and germanium-containing precursors. According to the new model, the germanium concentration x is related to the gas phase ratio according to the equation [x/(1−x)]2=mPGe/PSi, and m=Ae−E/(RT), where PSi is the partial pressure of the silicon-containing precursor, PGe is the partial pressure of the germanium-containing precursor, A is a constant, R is the universal gas constant, and T is the temperature. Methods and apparatuses are described for controlling CVD process parameters, associated with a series of reactions at constant or varied temperature, to achieve targeted germanium concentrations in silicon germanium films deposited onto semiconductor substrates. In particular, the new model can be used to calculate the resultant germanium concentration for selected precursor flow rates. The new model can also be used to control a precursor injection apparatus to achieve a desired germanium concentration.